adds search support with exa

server/prisma/schema.prisma

@@ -22,6 +22,10 @@ enum MessageRole {
   tool
 }
 
+enum SearchSource {
+  exa
+}
+
 model User {
   id        String   @id @default(cuid())
   createdAt DateTime @default(now())
@@ -31,6 +35,7 @@ model User {
   handle String? @unique
 
   chats Chat[]
+  searches Search[]
 }
 
 model Chat {
@@ -92,3 +97,50 @@ model LlmCall {
   @@index([chatId, createdAt])
   @@index([provider, model, createdAt])
 }
+
+model Search {
+  id        String       @id @default(cuid())
+  createdAt DateTime     @default(now())
+  updatedAt DateTime     @updatedAt
+
+  title String?
+  query String?
+
+  source SearchSource @default(exa)
+
+  requestId   String?
+  rawResponse Json?
+  latencyMs   Int?
+  error       String?
+
+  user   User?   @relation(fields: [userId], references: [id])
+  userId String?
+
+  results SearchResult[]
+
+  @@index([updatedAt])
+  @@index([userId])
+}
+
+model SearchResult {
+  id        String   @id @default(cuid())
+  createdAt DateTime @default(now())
+
+  search   Search @relation(fields: [searchId], references: [id], onDelete: Cascade)
+  searchId String
+
+  rank Int
+
+  title         String?
+  url           String
+  publishedDate String?
+  author        String?
+  text          String?
+  highlights    Json?
+  highlightScores Json?
+  score         Float?
+  favicon       String?
+  image         String?
+
+  @@index([searchId, rank])
+}